I took a track of a girl singing, then duplicated it a few times so you get a few different tracks with the same sample in the sampler, started my sample on each of those duplicated tracks on a different moment in the sample, so you get a few different samples. you can then play them on different notes on your keyboard too, make a melody, then add a new track and set input to 'resample', record, delete the other miditracks, and then you have that kind of melody.
So basically just playing out your melody with the sample, and resampling it so you have it. I never knew it was this easy





